Dental flask.



-UNiTED v STATES 'ATENr Prion..

-WvILLlAM VAEGEL, OF READlNGr, PENNSYLVANIA.

DENTAL FLASK.

'SPECIFICATION forming part of Letters Patent No. 71 5,182, datedDecember 21902.

Application filed July 3, 1902. Serial No. 13.4,256i (VNO model.) l

To all whom t muy concern,.-

Beit known that I, WILLIAM WAEGEL, a. citizen of the United States,residing at Reading, in the county of Berks and State of Pennsylvania,have invented new and useful lmprovements in Dental Flasks, of which thefollowing is a specification.

This invention relates to adental flask; and the object sought is toprovide simple and et'- fective means for .securing the members of theflask together without liability of the fastening devices slipping outof place during the securing operation or after the parts have beenassembled and also to render th'e secnring operation convenient byproviding means for holding the securingl bolts and nuts positively inapplied position in relation to the members of the Hask.

lVith these and other objects andadvantages in view the inventionconsists in the construction and arrangement of the several parts, whichwill be more fully hereinafter described and claimed.

In the drawings, Figure l is a perspective view of a flask, showing thefeatures of the invention applied thereto. Fig. 2 is a centraltransverse vertical section of the ask. Fig. 3 is a detail perspectiveview of the npper body member of the flask. Fig. 4 is a bottom plan viewof the lower body member of the liask. Fig. 5 represents detailperspective views of the form of bolt and nut preferably used insecuring the membersV together.

Similarnumerals of reference are employed to indicate correspondingparts in the several views.

The numeral 1 designates a lower body member of a flask which has aclosed bottom 2, -and thereon is disposed an upper body member 3, overwhich a cover 4 is arranged. The shape of the entire flask and themembers composing the same is well understood in the art, and as theadvantage of the contour shown is appreciated it will be unnecessary toexplain the same. In many of the flasks in use great difficulty has beenexperienced in securing the parts or members thereof in such mannerthatv they will be reliably held together, and much annoyance has arisenfrom a failureof the old form of fastenings remaining in operativerelation to the flask members during the securing operation, andfrequently irregular pulls on the llask members, owingfto displacementof the fastening means therefor, have resulted in the disarrangernent ofthe mold and cooperating devices held withiu the flask. The presentimprovement has been designed to overcome these difficulties as beforeset forth, and in constructing the members'l and 3 they are formed withupwardly-projecting flanges or guards 5, extending vertically thereofand having an ontwardly-openingspace G between them. The cover is alsoformed with inwardly-extending slots 7, having upper surrounding raisedrims 8. The flanges 5 and slots 7, with their surrounding rims, areformed in the members 1 and 3 and cover 4 at three points in triangularrelation to effectively secure the members and cover in View ofthecontour or shape of the said parts.

The rims 8 are formed with eountersnnk seats 9, as clearly indicated byFig. 2, andthe lower portions of the flanges 5 of the bottom member 1have inner angular recesses 10 ext-euding upwardly thereinto andunitedly forming sockets ot substantial angular contour.

The securing means for the members 1 and 3 and cover 4 comprisebolt-rods 11, having upper screw-threaded terminals 12 and lower heads13, preferably of rectangular form, and cooperating with said boit-rodsare nuts 14, formed with depending bosses 15, which in the presentinstance are circular in form to tit in the sockets 9 of-the rims 8..Instead of the bosses 15 separate washers maybe used and inserted in thesockets withiequal efficiency. In arranging these fastening devices thebolt-rods l1 are pushed upwardly through the spaces 6 between theflanges 5 of the members l and 3 and also through the slots 7, with theheads'l resting in the sockets 10, thesaid heads when in the socketspreventing the bolt-rods from turning, and thereby facilitating theapplication of the nuts 14. After the bolt-rods have been inserted inthe spaces 6, as set forth, the nuts are then applied and screwed downuntil ythe bosses 15 enter the sockets 9. As well known in the art towhich this invention pertains, what may be termed the rear bolt-rod 11is longer than those in advance of the same for convenience inassembling and separating the members 1 and 3 without liability oflaterally shifting the member 3 on the member 1. In other words, theforward holt-rods on opposite sides of the cen-ter and substantially atthe front of the flask may have the nuts thereon removed and saidbolt-rods pushed downwardly far enough to clear the heads thereof fromthe sockets in the flanges of the bottom member, and after the nut onthe rear bolt-rod is disengaged the cover 4 may be readily removed andthe section 3 drawn upwardly from the mold and guided by the rearbolt-rod in such manner as to assist in preventing lateral movement ofthe upper member 3, and thereby avoid liability of injury to the portionof the mold in said latter member. This differentiation in the length ofthe bolt-rods is also important and advantageous in assembling themembers l and 3 in the preliminary steps' of the molding operation, asthe front bolt-rods can be easily applied without lifting the members 1and 3 from a supporting-base. To accommodate this operation, the flanges5 of the bottom member 1 at opposite points and near the front of thesame are elevated or of less vertical extent than the rear flanges, asclearly shown byFigs. 1 and 2.

'When the bosses 15 and sockets 9 are used, the nuts 14 will beprevented from slipping out of place, and the cover 4, as well as themembers 1 and 3, will be more positively tightened and held againstliability of displacement. To assist in preventing rotary twistingmovement of the member 3 on the member 1, the latter has shoulderedstop-lugs or projections 16, with which depending iingers 17 incorresponding positions on the member 3 are adapted to engage. This isalso a well-known feature of invention in this art.

From the foregoing description it will be understood that the presentinvention refers to what are known as anchor or slot flasks, and theparticular construction of the several parts conjointly operate torender this class of devices more effective and convenient in theoperation of molding. To reduce the friction as much as possible, thebottoms of the sockets 9 are horizontally flat and the faces of thebosses 15 engaging with the said bottoms are also fiat.

Having thus fully described the invention, what is claimed as new is- 1.A flask comprisinga bottom member, an upper member, and a coverinseparable relation, the bottoni member having vertical flanges projectedoutwardly therefrom from the top to the bottom and provided with spacesbetween them and also formed with sockets in their lower ends, the uppermember having correspondingly-spaced anges extending fully from thelower to the top edges thereof and the cover havinginwardlyprojectingslots, said members also having other flanges extending partially overthe height of the lower member and fully over the height of the uppermember and corresponding in structure to the first-namedanges,bolt-rodsextendingupwardlythrough the flanges and having the headsthereof engaging the sockets in the lower ends of the flanges, and nutsremovably applied to the upper ends of the bolt-rods and bearing on therim of the cover, interposed holding devices being located between thenuts and the adjacent portions of the cover.

2. A flask comprising separable top and bottom members and a cover, thetwo members having outwardly projecting anges with spaces between themin vertical alinement, the lower ends of the flanges -on the bottom`member being formed with inclosed sockets, and the cover having slotsextending thereinto to coincide with the spaces between the flanges andsurrounded by rims with recesses in the upper sides thereof, bolt-rodsextending vertically through the flanges of the membersand the slots andhaving angular heads held in the sockets in the lower ends of theflanges of the bottom member, washers surrounding the bolt-rods andresting in the recesses in the upper sides of the rims, and nutsremovably mounted onithe bolt-rods and bearing upon the washers andrims, the flanges extending over the full vertical height of the topmember and a portion of the same extending the full vertical height overthe lower member whereby the bolt-rods will be inclosed within theflanges.

In testimony whereof I/afx my signature in presence of two witnesses.

WILLIAM VVAEGEL.

Witnesses:

CHARLES R. WERNER, OHAS. R. RIsDoN.

